Insufficient Short-circuit Capacity Of Fuses May Cause Significant Safety Hazards.

If the short-circuit capacity of the drop out fuse fuse is lower than the lower limit of the system short-circuit current, it may not be able to interrupt the current in time when a fault occurs.

In such cases, when the fault current far exceeds the interrupting capacity designed for the fuse, the arc after the fuse element melts may not be extinguished quickly. An excessively long arc duration can generate extremely high temperatures and pressures inside the fuse tube, potentially leading to damage to the fuse tube's mechanical structure, metal fragmentation, and even explosion. Such ruptures not only damage equipment but may also pose a serious threat to personnel safety.